Imperial College London
Dr João Pedro Malhado

DrJoão PedroMalhado

Faculty of Natural Sciences, Department of Chemistry

Senior Teaching Fellow
 
 
 
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Contact

 

malhado

 
 
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Location

 

248ChemistrySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Austin:2021:10.1038/s41598-021-82232-1,
author = {Austin, D and Johnson, A and McGrath, F and Wood, D and Miseikis, L and Siegel, T and Hawkins, P and Harvey, A and Maín, Z and Patchkovskii, S and Vacher, M and Malhado, JP and Ivanov, M and Smirnova, O and Marangos, J},
doi = {10.1038/s41598-021-82232-1},
journal = {Scientific Reports},
title = {Extracting sub-cycle electronic and nuclear dynamics from high harmonic spectra},
url = {http://dx.doi.org/10.1038/s41598-021-82232-1},
volume = {11},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We present a new methodology for measuring few-femtosecond electronic and nuclear dynamics in both atoms and polyatomic molecules using multidimensional high harmonic generation (HHG) spectroscopy measurements, in which the spectra are recorded as a function of the laser intensity to form a two-dimensional data set. The method is applied to xenon atoms and to benzene molecules, the latter exhibiting significant fast nuclear dynamics following ionization. We uncover the signature of the sub-cycle evolution of the returning electron flux in strong-field ionized xenon atoms, implicit in the strong field approximation but not previously observed directly. We furthermore extract the nuclear autocorrelation function in strong field ionized benzene cations, which is determined to have a decay of τ0=4±1 fs, in good agreement with the τ0=3.5 fs obtained from direct dynamics variational multi-configuration Gaussian calculations. Our method requires minimal assumptions about the system, and is applicable even to un-aligned polyatomic molecules.
AU  - Austin,D
AU  - Johnson,A
AU  - McGrath,F
AU  - Wood,D
AU  - Miseikis,L
AU  - Siegel,T
AU  - Hawkins,P
AU  - Harvey,A
AU  - Maín,Z
AU  - Patchkovskii,S
AU  - Vacher,M
AU  - Malhado,JP
AU  - Ivanov,M
AU  - Smirnova,O
AU  - Marangos,J
DO  - 10.1038/s41598-021-82232-1
PY  - 2021///
SN  - 2045-2322
TI  - Extracting sub-cycle electronic and nuclear dynamics from high harmonic spectra
T2  - Scientific Reports
UR  - http://dx.doi.org/10.1038/s41598-021-82232-1
UR  - http://hdl.handle.net/10044/1/86904
VL  - 11
ER  -
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